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. 2009 Dec 23;4(12):e8466. doi: 10.1371/journal.pone.0008466

Figure 5. Individual locomotor activities with respect to group throughout the life span.

Figure 5

Young adult and old rats were tested at 4 and 22 months old, and again at 12 and 30 months old. There was a significant correlation in locomotor activity between the mean performance for each test subject at the first testing period (ten trial average) and second testing period (seven trial average) of locomotor activity tested eight months later: a. movement number, p<0.0001, r = 0.865; b. horizontal activity (HAC), p = 0.0001, r = 0.846; c. time spent moving (as seconds per hour), p<0.0001, r = 0.868. Data not shown are movement speed (cm/sec), p = 0.0001, r = 0.848, and distance traveled (cm/hr), p<0.0001, r = 0.881.